142005905 has 8 divisors (see below), whose sum is σ = 179376000. Its totient is φ = 107625456.

The previous prime is 142005883. The next prime is 142005911. The reversal of 142005905 is 509500241.

142005905 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 142005905 - 2¹² = 142001809 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 747305 + ... + 747494.

It is an arithmetic number, because the mean of its divisors is an integer number (22422000).

Almost surely, 2^142005905 is an apocalyptic number.

It is an amenable number.

142005905 is a deficient number, since it is larger than the sum of its proper divisors (37370095).

142005905 is a wasteful number, since it uses less digits than its factorization.

142005905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1494823.

The product of its (nonzero) digits is 1800, while the sum is 26.

The square root of 142005905 is about 11916.6230535332. The cubic root of 142005905 is about 521.7175762165.

The spelling of 142005905 in words is "one hundred forty-two million, five thousand, nine hundred five".